1/*- 2 * Copyright 2005 Thomas Hellstrom. All Rights Reserved. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sub license, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice (including the 12 * next paragraph) shall be included in all copies or substantial portions 13 * of the Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 18 * THE AUTHOR(S), AND/OR THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 21 * DEALINGS IN THE SOFTWARE. 22 * 23 * Author: Thomas Hellstrom 2005. 24 * 25 * Video and XvMC related functions. 26 */ 27 28#include <sys/cdefs.h> 29__FBSDID("$FreeBSD: releng/10.2/sys/dev/drm/via_video.c 207318 2010-04-28 10:33:41Z rnoland $"); 30 31#include "dev/drm/drmP.h" 32#include "dev/drm/via_drm.h" 33#include "dev/drm/via_drv.h" 34 35void via_init_futex(drm_via_private_t * dev_priv) 36{ 37 unsigned int i; 38 39 DRM_DEBUG("\n"); 40 41 for (i = 0; i < VIA_NR_XVMC_LOCKS; ++i) { 42 DRM_INIT_WAITQUEUE(&(dev_priv->decoder_queue[i])); 43 XVMCLOCKPTR(dev_priv->sarea_priv, i)->lock = 0; 44 } 45} 46 47void via_cleanup_futex(drm_via_private_t * dev_priv) 48{ 49} 50 51void via_release_futex(drm_via_private_t * dev_priv, int context) 52{ 53 unsigned int i; 54 volatile int *lock; 55 56 if (!dev_priv->sarea_priv) 57 return; 58 59 for (i = 0; i < VIA_NR_XVMC_LOCKS; ++i) { 60 lock = (volatile int *)XVMCLOCKPTR(dev_priv->sarea_priv, i); 61 if ((_DRM_LOCKING_CONTEXT(*lock) == context)) { 62 if (_DRM_LOCK_IS_HELD(*lock) 63 && (*lock & _DRM_LOCK_CONT)) { 64 DRM_WAKEUP(&(dev_priv->decoder_queue[i])); 65 } 66 *lock = 0; 67 } 68 } 69} 70 71int via_decoder_futex(struct drm_device *dev, void *data, struct drm_file *file_priv) 72{ 73 drm_via_futex_t *fx = data; 74 volatile int *lock; 75 drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private; 76 drm_via_sarea_t *sAPriv = dev_priv->sarea_priv; 77 int ret = 0; 78 79 DRM_DEBUG("\n"); 80 81 if (fx->lock >= VIA_NR_XVMC_LOCKS) 82 return -EFAULT; 83 84 lock = (volatile int *)XVMCLOCKPTR(sAPriv, fx->lock); 85 86 switch (fx->func) { 87 case VIA_FUTEX_WAIT: 88 DRM_WAIT_ON(ret, dev_priv->decoder_queue[fx->lock], 89 (fx->ms / 10) * (DRM_HZ / 100), *lock != fx->val); 90 return ret; 91 case VIA_FUTEX_WAKE: 92 DRM_WAKEUP(&(dev_priv->decoder_queue[fx->lock])); 93 return 0; 94 } 95 return 0; 96} 97